Ender 3 V2 with BLtouch first layer junk.
First off I’m a newbie to 3D printing. I installed a BL touch on my ender 3v2, and updated the firmware and modified the code to include G29. My problem is that when I print anything now the front left corner of bed (it smears the filament) is too close to the nozzle and the right rear corner is too far, won’t stick to bed. I manually leveled the bed and even upgraded the bed springs to heavier ones. I attached a pic of the first layer, maybe 70mm x 40mm object. The z axis motor turns the nozzle down when it gets to the left corner and then up at the right corner. I have set my Z offset some many times to try and fix this, no change. I thought maybe the bed had a problem, I turned it backwards, no change. Any help would be appreciated.
Well I figured it out. First toss the BL touch in the trash (waste of money) then the 2 screws that hold the z axis extension arm on to the main carriage on the left side where loose. The arm would flex and constantly change the z offset.